package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

/**
 * @author : by smomo
 * @date : 2023/7/10 12:12
 * @description :
 */

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void save(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除---是否存在起售中的菜品
        for (Long id : ids) {
           Dish dish=dishMapper.getById(id);
           if(dish.getStatus()==StatusConstant.ENABLE)
           {
               //当前菜品在起售中
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
        //判断当前菜品是否能够删除---是否存在套餐关联
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIdsByDishIds!=null&&setmealIdsByDishIds.size()>0)
        {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        ids.forEach(id->{
            dishMapper.deleteById(id);
            dishFlavorMapper.deleteByDishId(id);
        });
    }

    @Override
    public DishDTO getById(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> flavorList = dishFlavorMapper.getById(id);
        DishDTO dishDTO = new DishDTO();
        BeanUtils.copyProperties(dish,dishDTO);
        dishDTO.setFlavors(flavorList);
        return dishDTO;
    }

    @Override
    @Transactional
    public void updateDishWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //更新菜品基本信息
        dishMapper.update(dish);
        //根据id删除原有的口味信息
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }



    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }
}
